Bui. 1170, U. S. Dept. cf Agriculture. 



Plate V. 



i:#- ; 



Fig. I. — Unit in the 30-Acre Pasture Closed to Grazing in I920. 



Note the planl j of ArU misia frigida, which are taller and more numerous than in the mm 

 in L918and 1919. Oct ber, L921. 



Fig. 2. — Unit in the 30-Acre Pasture Closed to Grazing in 1921. 



Note the plants of A rlcmisia frigiia, which are much larger, coarser, and thicker on the ground 

 than in the units closed during the previous seasons. October, 1 921 . 



